Molding-machine.



No. 7|3,'o47.. Param-ed. Nov. n, |902.

. J. ANDERSON.

HOLDING MACHINE.

(Application filed Nov. 1, 1901.)

(-No Model.) I' 2 Shees--$heet 2. y

:Tins co. Hom-una), wAsHmsTnN n c UNITED STATES PATENT OFFICE,

JOHN ANDERSON, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPER COMPANY, OF'HOPEDALE, MASSACHUSETTS, Av CORPO- RATION OF MAINE.

HOLDING-MACHINE.

SP EGIFICATION forming part of Letters Patent No. '7l 3,047, dated November 1 1, 1902.

Application filed November 1l 1901l Serial No. 80,746. (No model) i T0 a/ZZ whom, it may concern: i

Beit known that l, JOHN'ANDERSON, a citizen of the United States, and a resident of Hopedale, county of Worcester, State of Massachusetts, have invented an Improvement in Molding-Machines, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to y machines for facilitating the construction of molds formetalfounding; and it'has for its object the production of a very accurate, simple, and efflcient machine particularly adapted for use in making molds from large and intricate patterns and so constructed that rapid operation by unskilled labor will not injuriouslyalfect the character of the workproduced.

The machine-forming the subject-matter of my present invention belongs to the type wherein the parting face ofthe mold is made by a firmly-supported stripper-plate, the pattern being movable in a path absolutely at right angles thereto, and it is well-known that any slight deviation of the pattern from such path when it is drawn from the mold will produce a corresponding defect in the latter. Manifestly when molding large patterns the error in the movement of the pattern will be magnified', and it has rbeen exceedingly diftlcultheretofore to produce large molds accurately with machines of this type, owing to the lost motion between the moving parts and to the rapid deterioration of the machine by use.

I have produced a machine which can be successfully used for the largest pieces of work capable of production by machine-molding and which'while being highly accurate in tru cli-wheels being omitted on the nearer side,

the pattern-carrier being elevated. Fig. 2 is a top or plan view thereof, also centrally broken out. Fig. 3 is a right-hand end elevation of the machine shown in Fig. l, the casing for the,V connection between the operating-shafts being broken out. Fig. 4 is a .transverse section on the linea 4, Fig. 2, look- V sheaves to bereferred to, the sheaves being opened out and shown side by side; and Fig. 7 is an enlarged detail inelevation of the adjustable connection between vone of the operating-shafts and the power-transmitting member.'

Referring to Figs. 1 to 4, inclusive, the operative parte of the machine are mounted on a strong and heavy frame'V comprising upturned parallel sides F, which "to save weight are made open and constitute practically trusses which are very strong and rigid for their weight, the said sides having their upper longitudinal edges carefully planed, as at FX, to constitute a support for a stripperplate S, (partly shownin dotted lines, Fig. 3,) which will be secured to the tops of the sides by suitable screws. The sides .are rigidly connected at their bottoms by a base comprising transverse girders F', centrally connected by a longitudinal brace-bar F2. Two longitudinal'L-shaped bars F3 extend from one to the other of the girders near the lower portions of the sides and are connected'therewith at intervals by suitable stiffening-Webs 5, the tops of the bars being planed'and in the same horizontal plane as the tops of upright bosses j" on the girders F' to constitute a support for a stool-plate when .it is desired to use such a device, the stool-plate supports being entirely'inside ot'A the path of movement of the pattern-carrier, to be hereinafter referred The frame is thus open-ended, and thus is adapted to support a very large stripperplate much longer than the actual length of the frame, and by having the frame open at its ends a pattern-plate of corresponding length and also a steol-plate of corresponding length may be used.

Inasm nch as this apparatus is heavy,I have herein shown means for facilitating its movement from place to place, and for this purpose the frame at its base is provided with transverse bearings f2 to receive truck-shafts T, the ends of which extend beyond the bearings and have mounted thereupon suitable truck-wheels TX. The uptnrned sides of the frame are provided at each end and on the exterior thereof with vertical and tranverselycurved enlargements F, open at their lower ends and at their upper ends provided with circular holes f4 to receive the upper ends of depending guides G, (shown as cylindrical posts,) the lower ends of which are provided with headsg, havinglaterally-extended wings g to rest against seats j"5 on the frame and to which they are secured by suitable bolts g2. The enlargements F4 not only support at their upper ends the tops of the guides, but they also partly surround the same and act as shields to protect theinclosed parts from access of sand or loam, the tops of the enlargements being coned or inclined, as at 6, to shed sand falling thereupon. The said enlargements are opened toward the inside of the machine, as clearly shown in Fig. 4, for a purpose to be described.

The pattern-carrier in the present embodiment of my invention comprises two separated and parallel vertical side members, herein shown as heavy bars C, the tops C' of which are planed and are located in the same horizontal planete constitute a support for the pattern-plates PX (see Fig. 3) of any usual construction, the pattern-plate being secured in place on the pattern-carrier by suitable screws. lach side of the pattern-carrier has secured to it opposite the vertical guides G a depending bracket C2, provided outside of the said member C with an elongated vertical hub CX, which embraces the adjacent guide andvertically slides thereupon, the hubs being of sufficient length, as best shown in Fig. l, to provide an extended supporting part for each of the sides of the pattern-carrier, each side being thus vertically movable and slidably mounted upon two of the upright guides G. It is to be observed that the two sides of the pattern-carrier are unconnected, so that there is a clear space between them, thus providing ample room for any desired stool-plate and stools` carried thereby. Each carrier side is provided with two depending struts CX, to the lower ends of which are secured counterbalancing-springs SX, the upper ends of the springs being attached to suitable ears 8 on Vthe upper part of the frame sides F, the

moved toward and from the stripper-plate in a plane exactly parallel thereto at all times. Otherwise in drawing the pattern from the mold the latter will be injured or so distorted as to render it worthless, and inasmuch as there is no direct connection between the sides of the pattern-carrier in my present invention I have provided novel and perfectlyacting means for raising and lowering the pattern-carrier, so that the pattern-plate can always move in a plane absolutely lin parallelism with the stripper-plate. To this end the base of the frame is provided with bearings ff, two of such bearings being located at each side, as nearly directly in the path of movement of the sides of the pattern-carrier as is practically possible, each pair of bearings supporting an operating-shaft B, the ends of which extend beyond the ends of the frame, as shown in Figs. l and 2, said shafts being in parallelism. Each shafthas secured to it, on the portion projecting beyond the end of the frame, a sleeve b, having two rigidly-attached crank-arms b', connected by a crank-pin b2, so that each shaft is provided with two cranks, one at each end of the frame and outside of the transverse girders F.

A power-transmitting member or link D is pivot-ally connected at itslower end with each crank, and at its upper end it is pivotally mounted on the reduced and cylindrical end c2 of the adjacent member C of the patterncarrier and held in place thereon by a suitable washer w and cotter-pin or other device c3, so that when a shaft is lifted the attached member of the pattern-carrier will be raised or lowered, and in the drawings I have shown the pattern-carrier in its uppermost position, as it would be during the construction of the mold.

Referring to Fig. 3, it will be Seen that at such time a straight line willpass through the centers of one of the operating-shafts, the crank-pin b2, and the reduced cylindrical portion c2 of the member C, the crank-arms of the two shafts at such time being inclined outward at a slight angle with vertical lines drawn through the centers of their respective shafts. Now if the shafts B are rotated vsimultaneously in opposite directions, as indicated by the arrows 10, Fig. 4, and through equal arcs, it will be manifest that the sides of the pattern-carrier will be lowered simultaneously and through equal distances, so that the pattern-plate carried thereby will descend or move away from the stripper-plate in a plane parallel thereto, it being remembered that when the pattern-carrier is in its uppermost position the top faces C of the patterncarrier sides are in the same plane and eX- actly parallel to the plane of the stripperplate supports FX. In order to effect this simultaneous, opposite, and equal angular movement of the two operating-shafts B, I have devised novel yet simple means for accomplishing the same.

Referring to Figs. l and 2, Ithe shafts at the IOS IIO

IZO

right-hand end of the machine project a considerable distance beyond the cranks at that end, and I have mounted upon each shaft on such extended portion two sheaves M N. One of these sheaves, as M, is rigidly secured tothe shaftanditsfellowis adjustablymounted thereon, and the twopairs of sheaves are so located that the fast one on one shaft is located opposite to the adjustable one on the other shaft, and vice versa, as shown in Fig. 2. A suitable set-screw m (see Fig. 6) secures the sheave M to the shaft, and said sheave is provided on its periphery with a Viiattened portion mx, and its hub is connected with the rim portion by a series of radial arms m', each having an aperture m2 to receive a clamping-bolt m3, which extends through the web m1 of the sheave and through the apertures 'm2 in the Varms into segmental slots n2 in radial arms n', connecting the rim and the hub of the sheave N, the web n4 of said sheave having formed in it continuations of the segmental slots, as m20, Fig. 5. When the several clamping-bolts are set up by means of suitable nuts m5, (see Fig. 5,) the two sheaves of a pair will be irmly clamped together, and inasmuch as the sheave M is rigidly secured to the shaft the sheave N must also move rigidly with the shaft. The sheave N also has its periphery flattened, as at nx, Fig. 6, and an inwardly-extended stop-.ear ni' is adapted to receive the end of an adjusting-screw 40, mounted in a lateral ear m on the sheave M, the face of the latter being cut away, as at m15, FigrG, to permit access to said adjusting-screw. By loosening the clamp-bolts m3 the angular position ofthe sheave N relative to its fellow sheave M can` be changed with great nicety and accuracy by means of the adjusting-screw 40, the'relative position of the parts being clearly shown in Fig. 5. To connect the two shafts, I use two like flexible bands or belts lM NX,pref erably made of thin sheet-steel of great tensile strength, and the bands are secured to the two pairs of sheaves in a peculiar manner.

Y Referringto Fig. 5, the band M is attached sheaveN and wound thereuponseveral times,

and its-end is secured at the flattened part nx by fasteners 5,6, the winding on this'sheave N on the left-hand shaftrB, viewing Fig-5, and wrapped around itin thedirection of the arrow 18 and secured to the flattened portion of such sheave. f Of course it will be understood that the winding of the bands is effected after their ends are secured to the sheaves. The bands thus cross between the'two shafts, and the latter are connected in such a manner by the said bands that rotation of either shaft will be transmitted to the other shaft to rotate it simultaneously, but lin the opposite direction, through the same arc, the angular movement of the two shafts being thereby precisely alike. The adjustment provided for each pair of sheaves is to take up any stretch in the belts, inasmuch as the latter, although preferably made of steel, will stretch in time, and it also provides for effecting the absolutely simultaneous and opposite equal rotative movement of the shafts. One of the shafts has secured to it on its end projecting beyond the sheaves-a sleeve BB, to which is attached an operating-handle B10, and, viewing Fig. 3, if the said handle be swung in the direction `of the arrow 8O the cranks of the two sheaves B will be swung outwardly and downwardly simultaneously, thereby lowering the pattern-carrier to draw the pattern, such movement of the shafts being limited by a fixed stop 82,-engaging a shoulder Se of an adjustable stop mounted 'on the sleeve B8. This shoulder 84C' is formed on a split collar B12, mounted on an annular enlargement bs of the sleeveBS and clamped thereupon by a suitable clamp-bolt 83, Fig. 3. By adjusting this clamp-collar the throw or drawing movement of the pattern-carrier can Aloeincreased or decreased, as desired.

'lo limit the upward and inward movement of the cranks when the pattern-carrier is in its highest position, I' have provided the frame with the stop 90, (see Figs. 2 and 3,) which engages one of the cranks at such time.

Atwo-part shield or cover M10 M12 surrounds and iucloses the bands andthetwo pairs of sheaves, and the two parts are secured to- IIO gether by suitable bolts m12, each part or member. of the shield havingv two half-bearings lOO 102 to embrace the shafts B, which latter thereby support the shield, the fixed stop 82 being formed on one of the shield members, as shown in Figs. 2 and 3.A This shield prevents the entrauceof sand or loam Vto the operating connection Vbetween the shafts.

The constant use of a machine such .as herel in shown Iwill in time cause wear to some of the coperating moving parts, and more particularly to. the .points of connection of the power-trauernitting members D with the patdx, rotatably mounted on the crank-pin b2, said bushing being embraced by the split end of the link and normally clamped rigidly thereupon by a suitable clamp-screw d. The bushing is provided with a polygonal head d2 at one end between one of the pair of crank-arms b and the adjacent face of the split end of the link, and when it is desired to make an adjustment of the connection described the clamp-screw d is loosened, and by means of a wrench or Spanner' applied to the polygonal head (Z2 the bushing dx is turned in one direction or the other on the crank-pin b2 and within the split end of the link sufficiently to take up any wear and prevent lateral backlash or lost motion due to the same, and when such adjustment is effected the link is again clamped upon the bushing by setting up the screw d.

The power to raise and lower the patterncarrier is transmitted to the latter from the operating-shafts and points closely adjacent the pattern-plate itself, and the draft is very direct and approaches as closely as may be the Vertical path of movement of the patterncarrier.

The pattern-carrier is actuated simultaneously and equally at its four corners, each of the four transmitting members D performing its own work and acting simultaneously with all of the others by the mechanism herein shown, so that there is no possibility of any uneven movement of the patternplate, all parts thereof necessarily being moved in unison and equally.

Vhen the pattern is drawn from the mold, thereis no unbalanced pulllaterally, because the two links D at one side of the patternplate pull outwardlyand downwardly and the two opposite members D pull outwardly in the opposite direction and with a like force and also downwardly, absolutely preventing any tendency to lateral movement of the pattern.

I have herein shown one practical embodiment of my invention in the form which I now prefer to attain the best results; but various changes in detail and arrangement may be made without departing from the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a molding-machine, a frame having upright sides, vertical guides mounted thereon, a pattern-carrier comprising two separate sides slidable on said guides, two parallel operating crank-shafts extended longitudinally of and mounted on the frame at its base, means to simultaneously rock said shafts oppositely through equal arcs, said means including two crossed, flexible members oppositely wound around the axes of the shafts and connected therewith at their ends, and power-transmitting links pivotally connected with the pattern-carrier sides and with the crank-shafts, whereby rotative movement of the latter will simultaneously and equally raise and lower the pattern-carrier sides.

2. In a molding-machine, a frame, a pattern-carrier vertically slidable thereon, two parallel operating-shafts mounted on the frame at its base, links pivotally connected at their upper ends with the sides of the pattern-carrier and at their lower ends eccentrically connected with the operating-shafts, and means to rock said shafts oppositely in unison, said means including two crossed flexible members oppositely wound around the axes of the shafts and connected therewith at their ends.

3. In a molding-machine, a frame, a pattern-carrier vertically slidable thereon, two parallel operating-shafts mounted on the frame at its base, power-transmitting members connecting the pattern carrier and shafts, to raise and lower the former by rotative movement of the latter, and means to rock said shafts oppositely in unison through equal ares, said means including two crossed metallic bands oppositely wound around the axes of the shafts and secured at their ends to the shafts.

4. In a molding-machine, a frame, a pattern-carrier vertically slidable thereon, two parallel operating-shafts mounted on the frame at its base, power-transmitting members connecting the pattern carrier and shafts, to raise and lower the former by rotative movement of the latter, and means to rock said shafts oppositely in unison through equal arcs, said means including two crossed flexible members oppositely wound around the axes of the shafts, one end of each band being fixedly secured to one shaft and adj ustably secured to the other shaft, and vice versa.

5. In a molding-machine, a frame, a pattern-carrier vertically slidable thereon, two parallel operating-shafts mounted on the frame at its base, power-transmitting members connecting the' pattern carrier and shafts, to raise and lower the former by rota- TIO tive movement of the latter, and means to other, and a flexible metallic band secured to and extended around each fixed sheave and extended oppositely around and secured .to the adjustable sheave on the other shaft, the two bands crossing between the shafts, where- IZO bands crossing between the shafts, and an actuating-handle secured to one of the shafts, whereby angular movement thereof will be simultaneously transmitted to the other shaft by the crossed bands, through an equal arc and in the opposite direction.

8. In a molding-machine, a frame having upright sides, links depending from the sides of the pattern-carrierand connected at their lower ends with the crank-shafts, and means to oppositely rock the latter in unison through equal arcs, to impart to the pattern-carrier simultaneouslyat opposite sides thereof uniform rising or falling movement, said means including two crossed, exible members oppositely wound around the axes of the crankshafts and connected therewith at their ends.

9. In a molding-machine, a frame having upright, open sides, external vertical guide members rigidly secured to the sides, a pattern-carrier comprising separare parallel side members having hubsV extended outwardly through the sides of the frame to embrace and slide upon the guide members, a pair of parallel operating-shafts mounted on the frame, actuating connections between each side member of the pattern-carrier and a shaft, to raise and lower the said members by rotative movement of the shafts, and means to oppositely rock the latter in unison through equal arcs.

lO. In a molding-machine, a frame having upturned portions to constitute a stripperplate support and provided with vertical guides, a pattern-carrier vertically slidable on the guides and adapted to support a pattern-plate, two operating-shafts mounted in parallelism on the frame and operatively connected with the pattern-carrier, a xed sheave and an adjacent movable sheave on each shaft, the fixed sheave on one being located opposite the loose sheave on the other, an adjusting device to move the loose sheave angularly relative to the adjacent fixed sheave, means to clamp said sheaves together when adj usted, and two iexible steel bands each secured at one end to a fixed sheave, wound around it and oppositely wound around the adjustable sheave on the other shaft and secured to said sheave, said bands crossing between the shafts, whereby angular movement of one shaft will impart simultaneously 0pposite and equal angular movement to the other shaft.

ll. In a molding-machine, a frame having n pright sides, a pattern-carrier vertically slidable thereon, two parallel operating-shafts mounted on the frame and extended beyond the ends thereof, a crank on the extended end of each shaft, a link connecting the upper part of the pattern-carrier with each crank, means connecting said shafts to eect opposite angular movement thereof in unison through equal arcs, an actuating-lever mounted on one of the shafts, and adjustable means on said shaft to limit rotative movement thereof in the direction to lower the patterncarrier.

l2. In a portable molding-machine,an openended frame `having upright sides and transverse bearings at its base, shafts in said bearings having attached truck-wheels, to support the frame, an open-ended pattern-carrier vertically slidable on the upright sides of the frame, operating-shafts mounted in parallelism on the frame, power-transmitting connections between them and the pattern-car rier, to raise and lower the latter by rotative movement of the shafts, and means to effect opposite angular movement of the shafts in unison through equal arcs, said means including two crossed, exible members oppositely wound around the axes of the shafts and connected therewith at their ends.

13. In a inolding-machine, a frame having upturned sides to constitute a stripper-plate support, two parallel operating-shafts'mounted on the lower part of theframe, adjustable means to rock said shafts in unison in opposite directions, said means including two crossed flexible members oppositely wound around the axes of the shafts and connected therewith at their ends; a pattern-carrier vertically slidable on the frame, power-transmitting connections between the pattern-carrier and the shafts, to raise and lower the former name to this specification in the` presence of l two subscribing witnesses. JOHN ANDERSON.V

Witnesses:

GEORGE Oris DRAPER, J. WALDo SAMPsoN.

IIO 

